Physical Chemistry of Surface Phenomena

Russian Journal of Physical Chemistry A

, Volume 86, Issue 4, pp 635-638

Adsorption isotherms of linoleic and linolenic acids from solutions in carbon tetrachloride on surfaces of highly dispersed manganese and copper ferrites

  • O. V. BalmasovaAffiliated withInstitute of Solution Chemistry, Russian Academy of Sciences Email author 
  • , V. V. KorolevAffiliated withInstitute of Solution Chemistry, Russian Academy of Sciences
  • , A. G. RamazanovaAffiliated withInstitute of Solution Chemistry, Russian Academy of Sciences

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Abstract

A comparative study of adsorption-desorption isotherms of linoleic and linolenic acids from solutions in carbon tetrachloride on surfaces of manganese and copper ferrites is performed by means of equilibrium adsorption. Adsorption isotherms of fatty acids are described in terms of the theory of volume filling of micropores, and the values of the limiting adsorption, the characteristic adsorption energy, and the pore space volume are calculated. It is established that the limiting adsorption values of linoleic and linolenic acids from solutions in carbon tetrachloride on a copper ferrite surface are higher than on a manganese ferrite surface. It is shown that the adsorption-desorption isotherms have a hysteresis loop.

Keywords

adsorption isotherms linoleic acid linolenic acid carbon tetrachloride manganese and copper ferrites